The Type-I Seesaw family
arxiv(2024)
摘要
We provide a comprehensive analysis of the Type-I Seesaw family of neutrino
mass models, including the conventional type-I seesaw and its low-scale
variants, namely the linear and inverse seesaws. We establish that all these
models essentially correspond to a particular form of the type-I seesaw in the
context of explicit lepton number violation. We then focus into the more
interesting scenario of spontaneous lepton number violation, systematically
categorizing all inequivalent minimal models. Furthermore, we identify and
flesh out specific models that feature a rich majoron phenomenology and discuss
some scenarios which, despite having heavy mediators and being invisible in
processes such as μ→ e γ, predict sizable rates for decays
including the majoron in the final state.
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